# According to molecular orbital theory, the species among the following that does not exist is:

more_vert

According to molecular orbital theory, the species among the following that does not exist is:

a. He2-
b. He2+
c. O22-
d. Be2

more_vert

verified

The correct answer is  d)  Be2

According to M.O.T. If bond order of chemical species is zero then that chemical species does not exist

Chemical species Bond Order
$$He_2^{-}$$ 0.5
$$He_2^+$$ 0.5
$$O^{2-}_2$$ 1
$$Be_2$$ 0